Pilot/Controller Glossary

ATC SECURITY SERVICES- Communications
and security tracking provided by an ATC facility in
support of the DHS, the DOD, or other Federal
security elements in the interest of national security.
Such security services are only applicable within
designated areas. ATC security services do not
include ATC basic radar services or flight following.
ATC SECURITY SERVICES POSITION- The
position responsible for providing ATC security
services as defined. This position does not provide
ATC, IFR separation, or VFR flight following
services, but is responsible for providing security
services in an area comprising airspace assigned to
one or more ATC operating sectors. This position
may be combined with control positions.
ATC SECURITY TRACKING- The continuous
tracking of aircraft movement by an ATC facility in
support of the DHS, the DOD, or other security
elements for national security using radar (i.e., radar
tracking) or other means (e.g., manual tracking)
without providing basic radar services (including
traffic advisories) or other ATC services not defined
in this section.
ATS SURVEILLANCE SERVICE [ICAO]" A term
used to indicate a service provided directly by means
of an ATS surveillance system.
ATC SURVEILLANCE SOURCE" Used by ATC
for establishing identification, control and separation
using a target depicted on an air traffic control
facility"s video display that has met the relevant
safety standards for operational use and received
from one, or a combination, of the following
surveillance sources:
a. Radar (See RADAR.)
b. ADS-B (See AUTOMATIC DEPENDENT
SURVEILLANCE-BROADCAST.)
c. WAM (See WIDE AREA MULTILATERATION.)
(See INTERROGATOR.)
(See TRANSPONDER.)
(See ICAO term RADAR.)
(Refer to AIM.)

ATS SURVEILLANCE SYSTEM [ICAO]" A
generic term meaning variously, ADS-B, PSR, SSR
or any comparable ground-based system that enables
the identification of aircraft.
Note: A comparable ground-based system is one
that has been demonstrated, by comparative
assessment or other methodology, to have a level

of safety and performance equal to or better than
monopulse SSR.

ATCAA-
(See ATC ASSIGNED AIRSPACE.)

ATCRBS-
(See RADAR.)

ATCSCC-
(See AIR TRAFFIC CONTROL SYSTEM
COMMAND CENTER.)

ATCT-
(See TOWER.)

ATD-
(See ALONG-TRACK DISTANCE.)

ATIS-
(See AUTOMATIC TERMINAL INFORMATION
SERVICE.)

ATIS [ICAO]-
(See ICAO Term AUTOMATIC TERMINAL
INFORMATION SERVICE.)

ATPA-
(See AUTOMATED TERMINAL PROXIMITY
ALERT.)

ATS ROUTE [ICAO]- A specified route designed for
channeling the flow of traffic as necessary for the
provision of air traffic services.
Note: The term "ATS Route" is used to mean
variously, airway, advisory route, controlled or
uncontrolled route, arrival or departure, etc.

ATTENTION ALL USERS PAGE (AAUP)- The
AAUP provides the pilot with additional information
relative to conducting a specific operation, for
example, PRM approaches and RNAV departures.
AUTOLAND APPROACH-An autoland system
aids by providing control of aircraft systems during
a precision instrument approach to at least decision
altitude and possibly all the way to touchdown, as
well as in some cases, through the landing rollout.
The autoland system is a sub-system of the autopilot
system from which control surface management
occurs. The aircraft autopilot sends instructions to the
autoland system and monitors the autoland system
performance and integrity during its execution.
AUTOMATED EMERGENCY DESCENT-
(See EMERGENCY DESCENT MODE.)

AUTOMATED INFORMATION TRANSFER
(AIT)- A precoordinated process, specifically